Polish-rod clamp



M 1927' T. O'BOYLE ET AL POLISH- ROD CLAMP Filed Sent. 18, 1923 gmwnm 2?afforueqv fill Patented May 24, 1927.

UNITED STATES 1,629,584 PATENT OFFICE.

THOMAS OBOYLE AND REX G. HAMAKER, OF HOUSTON, TEXAS; SAID OBOYLE AS-SIGNOR TO SAID HAMAKER.

POLISH-ROD CLAMP.

Application filed September 18, 1923. Serial No. 663,459.

This invention relates to new and useful improvements 111 a polish rodclamp.

One object of the invention is to provide a f clamp of thecharacterdescribed which is specially designed for use in connectionwith a pump, particularly an oil well pump, for the purpose ofconnecting the polish rod of the pump to the walking beam whereby thesaid pump rod is reciprocatcd.

Another object of the invention is toprovide a polish rod clamp throughwhich the cable, which is connected to the walking beam, maybe alsoconnected to the pump rod.

A further teature of the invention resides in the provision of a clampto which the cable may be readily connected in such a manner as not tobe injured or weakened through the reciprocating movement to which it issub jected as the pump is operated,

\Vith the above and other objects in view, theinvention has particularrelation to certain novel features of construction, arrange.

nent of parts and use, an example of which is given in thisspecification, and illustrated in the accompanying drawings, whereinFigure 1 shows a plan view of the clamp partly in section.

l*igi.1re 2 shows a side viewrshowing one of the cable bearings insection; and,

Figure 3 is an end view.

In the drawings the numerals 1., 1, designate the clamp sections or jawswhich. are secured together at their upper and lower ends by means ofthebolts 2, 2, and 3, 3,-

rcspectively. The inner side of each jaw has a vertical groove, as 4,said grooves coinciding when the jaws are clamped together, and forminga bearing for the polish rod, said bearing being substantially square incross section. The sections are spaced a dis tance apart so that thebolt nuts may be tightened up to' securely tighten the clamp on saidrod. The clamp has the lateral pintlcs. upon which the cable bearings 5,5, are pivoted. As shown. these pintles are formed by the half roundprojections 6, 6, .ed integrally with each section of the cl A clearlyillustrated in Figures 1 and 3; and the cable hearings are retained onsaid pinrles by means of suitable'cotters as 7.

The construction of the walking beam through which the pump is operatedis well known to those familiar with the art of pumping wells in oilfields, said walking beam being in common use. .A cable is attwiststached to the end of said walking beam, and its ends are secured aroundthe cable bear ings or sheaves 5. The cable is designated by the numeral8 inFigure 3, and is shown applied to the sheave in Figure 3, saidsheave being extended on one side and taperin as illustrated in Figure3, so as to form a more perfect bearing with the loop of the cable,andto conform in shape to said loop. As the walking beam is reciprocatedup and 1 down the clam) and )um rod will be reciprocated up anddown,said bearings 5 pivoting on said pintles so that the cable will besubjected at all times to only a straight pull, and will not besubjected to lateral and bends and weakened thereby.

The clamp sections 1 are thickened on their outer sides by the wide,vertical ribs'9, the sides of said ribs abjacent the bolt heads beingformed into abrupt shoulders 10, which abut against said heads andprevent the bolts from turning when screwing the nuts thereon. Theseribs also strengthen the clamp sections, at their points otgreatestweakness, by being formed opposite the grooves 4;.

What we claim is: g

1. A polish rod clamp including a pair of clamp jaws, one side of eachjaw being provided with a vertical groove, said grooves registering whenthe jaws are clamped to- 'ether, and forming a bearing for the polish mgon each pintle.

2. A. polish rod clamp including a pair-oi clai'np aws, one side of eachjaw being provided with a vertical V-shaped groove, said registeringwhen the jaws are et together and forming a bearing for polish rod,bolts securing said jaws together, each jaw having a half roundprojection at each-end, said projections cooperating whenthe jaws aresecured together and thus forming pintles, one at each endof the aw anda cable bearing on each pintle. said cable bearings being rotatable onsaid pintles and each cable bearing being grooved to form cable seatstherein.

In testimony whereof we have signed our names to this specification.

THOMAS OBOYLE. REX G. HAMAKER.

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